This motor runs great but ever since I took the lower unit off to put on a 115 and then put it back on the 85 it will not shift into reverse. I have tried new cables and that is not the problem. I tried adjusting them and that doesnt work either. It seems as though it is almost about to shift and it just needs a little help as i can push it with my hand and make it shift. Could it be that I need to adjust it in the water?